Refillable fuse.



F. H. KAISER & J. G. CLEMENS. RE FILLABLE FUSE.

APPLICATION FILED MAB..B,1911.

Witnesses v nventors.

by W

v Attorneys UNITED STATES PATENT OFFICE.

FRANK H. KAISER AND JOHN G. CLEMENS, F BUFFALO, NEW YORK.

REFILLABLE FUSE.

Specification of Letters Patent.

Patented Oct. 3, "1911.

To all whom it may concern:

Be it known that we, FRANK H. KAISER and JOHN G. CLEMENS, citizens ofthe United States, residing at Buffalo, in the county of Erie, State ofNew York, have invented a new and useful Refillable Fuse, of which the Ifollowing is a specification.

This invention relates to cut outs for electricity, and more especiallyto those in which the circuit is broken by the burning out of the fusewire; and the object of the same is to produce a thermal fuse of thischaracter wherein the fuse wire can be replaced with but very littlework. This object is accomplished by a fuse whose construction is setforth in detail in the following specification, and shown in thedrawings wherem- Figure 1 is a central longitudinal sectional view ofthis fuse. Fig. 2 is a side elevation thereof. Fig. 3 is an end view.Fig. 4 is a cross section on the line 44:. of Fig. 1, and Fig. 5 is aperspectivedetail of one of the plugs referred to hereinafter.

In the drawings the numerals 1 designate the heads of this device,ofwhich there are two of like construction and a description of one willsuffice for both. Each head has a hollow cylindrical body closed at itsouter end and provided there with a knife edge terminal 2, the wholebeing formed of one piece of yellow'brass as usual, and through the endsof the head at opposite sides of said terminal are preferably formedholes 3 for the escape of gases when the fuse burns out. The bore 4 ofthe head is rather large at its mouth and down to an annular shoulder 5therein, and beyond said shoulder there is an axial socket.6 withinwhich is slidably inserted a metal plug 7. whose outer portion is solidand whose inner end in turn has a a socket 8 wherein is inserted theextremity of the fuse wire 9. Surrounding the wire for most of itslength is a sleeve 10 of asbestos or the like which smothers the arewhen the fuse is blown out. The fuse wire and its sleeve and the plugson the extremi-- tremit-y of this fuse wire 9 can be soldered screw 12or otherwise taking through the side of the latter. 13, surrounds thefuse wire, its opposite end passing into the .bore 4 of each head andbeing held therein by a set screw 14 or otherwise; and the purpose ofthis casing is obviously to protectthe fuse from injury and protectsurrounding things from injury when the fuse burns out.

The parts of the casing are of the materials usually employed in devicesof this character, and their sizes and proportions are also thosegenerally adopted and have no particular bearing on the gist of thisinvention. We consider it essential, however, that the fuse wire, theasbestos, and the plugs, shall be supplied to the user in numbers sothat quick substitution may be made when a fuse burns out. The setscrews 12 might be omitted entirely, or might be replaced by other meansfor holding the plugs in place in the sockets within the heads. Ifomitted, when the two heads are connected by inserting the ends of thecasing into their bores and setting up the set. screws 14, care shouldbe taken that the two heads are drawn closely and firmly toward eachother so that the two plugs will be well seated in the sockets in saidheads. But under ordinary circumstances the use of the set screws 12 andof the solder llwill remove the danger of having the fuse interrupt thefree flow of electricity, which of course is quite undesirable whateverthe use to which the current is to be put.

What is claimed is:

Finally, a casing of fiber, I

1. The herein described fuse comprising two heads, each having a tubularbody withv a socket in its inner end, a fuse wire having plugs at itsextremities removably seated in said sockets; and a tubular fiber casingsurrounding the filament and detachably connected at its extremitieswith said heads.

2. The herein described fuse comprising two tubular heads; the bore ofeach of which has an annular shoulder and an axial socket below saidshoulder, a fuse wire, two plugs each having a solid body'adapted to fitslidably in one of said sockets and a socket in its inner end receivingthe extremity of said wire, and a set screw taking radially inwardthrough the head against said solid portion, and a fibercasingconnecting the inner ends of said heads.

3. The herein described fuse comprising socket below said sh0ulder, afuse wire, two plugs each having a solid body adapted to fit slidably inone of said sockets and a socket in its inner end receiving theextremity of said wire, and a set screw takin radially through the headagainst said soli portion; a tubular fiber casing whose extremities areseated within the bores of said heads against their shoulders, and setscrews taking radiall inward through the walls of said heads an a ainstthe casing.

In testimony t at we claim the foregoing as our own, we have heretoaflixed our sig- 15 natures in the presence of two witnesses.

Witnesses THOMAS F. MAoNAUoH'roN,

FRANK J. SWEENEY.

